JPH10219751A - Hydraulic working machine and operating unit thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate operation by installing a plurality of operation-side rotary members corresponding to working-side rotary members respectively and being mutually connected rotatably to an operating device. SOLUTION: An operating device 11 consisting of a link mechanism, in which a link mechanism for a working device is contracted at a proper ratio, is mounted on a driver's cab. The device 11 has an operation transmission means composed of lever pulleys 44-46, wires 47-49, a valve-side pulley, etc. A bucket lever 43 for the device 11 is gripped at the time of operation, and each joint section for the device 11 is rotated when the lever 43 is moved so as to shift a bucket as visually observing the bucket and a job site while a boom is turned similarly when a boom lever 41 is revolved. When the whole device 11 is slewed as the lever 43 is left as it is gripped, a valve control lever 31 for a slewing control valve 28 is operated, and a revolving superstructure is rotated. Accordingly, operating efficiency can be improved without requiring skill, and cost can be reduced largely because structure is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic working machine such as a hydraulic shovel and an operation unit used for such a hydraulic working machine.

[0002]

2. Description of the Related Art Conventionally, a hydraulic shovel is provided with two operating levers for controlling an actuator of a working device. These operation levers can be operated in four directions, for a total of eight directions.
Further, in the hydraulic excavator, the boom, the arm, the bucket, and the revolving unit rotate in two directions, that is, in a total of eight directions. Yes, it is.

[0003]

In the conventional hydraulic shovel as described above, the operating directions of the boom, the arm, the bucket, and the revolving unit are different from the operating directions of the working operation lever. There has been a problem that considerable skill is required in order to grasp the relationship with the operation direction intuitively and operate the working device smoothly. In addition, there is a problem that a great difference occurs in the progress of the work due to the personal ability of the operator such as the skill level, which greatly affects the entire construction period.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to obtain a hydraulic working machine and an operating unit thereof which can be operated smoothly without requiring any skill. With the goal.

[0005]

According to a first aspect of the present invention, there is provided a hydraulic working machine having a working machine main body and a plurality of working-side rotating members rotatably connected to each other, and mounted on the working machine main body. Working device, a hydraulic cylinder for rotating a plurality of working-side rotating members, a switching circuit for switching the operating direction of the hydraulic cylinder, a hydraulic circuit unit for operating the hydraulic cylinder, and a working-side rotating member. An operating device having a plurality of operating side rotating members correspondingly and rotatably connected to each other, a sensor for detecting rotation of the working side rotating member, a valve body, and a rotatable to the valve body The valve control lever has a plurality of internal ports provided at intervals in the axial direction and is provided with a plurality of internal ports and is configured to rotate integrally with the valve body. Control valve inside It has a plurality of external ports connected to the port, and is connected to the rotating part so as to be rotatable to form a swivel joint. And a servo motor for rotating the rotating portion and the valve body in a direction to return the control valve to the neutral state in response to a signal from the sensor.

A hydraulic working machine according to a second aspect of the present invention includes an operating pulley that rotates together with an operating rotary member, a valve pulley that rotates a valve operating lever, and an operating pulley and a valve pulley. An operation transmitting means having a wire provided between them and transmitting the rotation of the operation side pulley to the valve side pulley is used.

A hydraulic working machine according to a third aspect of the present invention includes a unit case in which a control valve, a joint member, and a servomotor are housed, and a valve-side pulley is provided on an outer peripheral portion.

A hydraulic working machine according to a fourth aspect of the present invention comprises a lower traveling body, an upper revolving body that is pivotally mounted on the lower traveling body, and on which an operating device and an operating device are mounted, and an upper revolving body. Using a work machine body having a turning motor for turning, a switching valve for switching the operation direction of the turning motor is provided in the hydraulic circuit portion, and a turning control valve for the turning motor is fixed to a fixing member supporting the operating device, The turning control valve is operated by turning the operating device in the turning direction of the upper turning body, and the turning control valve is returned to the neutral state by turning the upper turning body.

An operation unit for a hydraulic working machine according to a fifth aspect of the present invention has a working machine main body and a plurality of working side rotating members rotatably connected to each other, and is mounted on the working machine main body. Operate a hydraulic working machine including a working device, a hydraulic cylinder for rotating a plurality of working-side rotating members, and a hydraulic circuit unit having a switching valve for switching the operating direction of the hydraulic cylinder and operating the hydraulic cylinder. Unit for operating a hydraulic working machine, comprising a plurality of operating-side rotating members respectively corresponding to the working-side rotating members and rotatably connected to each other, and mounted on the working machine body. A sensor for detecting rotation of the working-side rotation member, a valve body, a valve operation lever rotatably provided on the valve body and operated by an operation device, and a plurality of internal ports spaced apart in the axial direction. Provided It is to have and a rotating unit which rotates the valve body and the integral control valve for controlling the changeover valve,
It has a plurality of external ports connected to the internal port, and is rotatably connected to the rotating portion to form a swivel joint. An operation transmitting means for moving the control valve, and a servomotor for rotating the valve body and the valve body in a direction for returning the control valve to the neutral state in response to a signal from the sensor.

An operating unit of a hydraulic working machine according to a sixth aspect of the present invention includes an operating pulley that rotates with an operating rotating member, a valve pulley that rotates a valve operating lever, an operating pulley and a valve side. It is provided between the pulley and
An operation transmitting means having a wire for transmitting the rotation of the operation side pulley to the valve side pulley is used.

According to a seventh aspect of the present invention, there is provided an operating unit for a hydraulic working machine, comprising a unit case accommodating a control valve, a joint member and a servomotor, and having a valve-side pulley provided on an outer peripheral portion. It is.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a hydraulic excavator according to an example of an embodiment of the present invention. In the figure, an upper revolving unit 2 having a driver's cab 2A is provided on a lower traveling unit 1 so as to be pivotable. This upper structure 2
Is equipped with a working device 3. This working device 3
A boom 4 as a working-side rotating member rotatably connected to the upper swing body 2; an arm 5 as a working-side rotating member rotatably connected to the boom 4; 5 has a bucket 6 as a working-side rotating member that is rotatably connected to 5.

A boom cylinder 7 is provided between the upper swing body 2 and the boom 4, an arm cylinder 8 is provided between the boom 4 and the arm 5, and a bucket cylinder 9 is provided between the arm 5 and the bucket 6. Is provided. As these cylinders 7, 8, and 9, hydraulic cylinders are used. The upper swing body 2 is a swing motor 10 which is a hydraulic motor.
Thus, the lower traveling body 1 can be turned. Further, the working machine body of this example includes a lower traveling body 1, an upper revolving superstructure 2, and a revolving motor 10. In the cab 2A,
An operating device 11 is provided which constitutes a link mechanism obtained by reducing the link mechanism of the working device 3 at an appropriate ratio.

A boom sensor 12 for detecting rotation of the boom 4 is provided at a base end of the boom 4. Boom 4
An arm sensor 13 for detecting rotation of the arm 5 is provided at a connection between the arm 5 and the arm 5. A part of a link mechanism for rotating the bucket 6 is provided with a bucket sensor 14 for detecting the rotation of the bucket 6. As these sensors 12 to 14, for example, well-known rotation sensors that output an electric signal according to the rotation state, such as a potentiometer, can be appropriately selected and used. A unit case 15 of an operation unit for operating the working device 3 is disposed at an appropriate place on the upper revolving superstructure 2, for example, below a driver's seat. Each of the sensors 12 to 14 and the unit case 15 are electrically connected by wiring (not shown).

FIG. 2 is a schematic block diagram showing a main part of a hydraulic circuit of the hydraulic shovel of FIG. In the drawing, each of the cylinders 7 to 9 and the turning motor 10 are provided with respective operating directions (boom raising, boom lowering, arm cloud, arm dump, bucket cloud, bucket dump, turning right,
The switching valves 21 to 24 for switching between (turn left) are connected. The switching valves 21 to 24 are controlled by control valves (PPC valves) 25 to 28, respectively. Hydraulic circuit unit 2 having switching valves 21 to 24
The tank 9 is provided with a tank, a hydraulic pump, and the like (not shown), and may use a well-known hydraulic circuit of a hydraulic shovel. Therefore, various changes can be made to the details of the circuit configuration.

Of the above control valves, the swing control valve 2
As shown in FIG. 3, the valve 8 has a valve body 30 having four ports and a valve operating lever 31 provided on the valve body 30. Valve operating lever 3
Numeral 1 is rotatable between three positions of a neutral position (neutral) and left and right operation positions, and is configured to automatically return to the neutral position.

FIG. 4 shows the boom control valve 2 shown in FIG.
5, Arm control valve 26 and bucket control valve 27
FIG. 5 is a side view of FIG. The control valves 25 to 27 are a pair of movable pieces (spools) 3
A valve body 32 having 2a and 32b, and a valve operating lever provided on the valve body 32 so as to be rotatable integrally with the shaft 33 about the shaft 33 and selectively pressing one of the movable pieces 32a and 32b. 34 and a columnar rotating portion 35 provided integrally with the valve body 32.

The movable pieces 32a and 32b are connected to the valve body 32.
Are urged by a spring (not shown) incorporated in the horn to return to the projecting position. The valve operating lever 34 is rotatable between three positions, a neutral position and left and right operating positions, and is configured to automatically return to the neutral position.

At the outer periphery of the rotating portion 35, four (P (pump), T (tank), A, B) internal ports 35a to 35d are provided at intervals in the axial direction. In addition, four ring-shaped grooves 35e extending in the circumferential direction at intervals in the axial direction are provided in the outer peripheral portion of the rotating portion 35,
The internal ports 35a to 35d open at the bottom of each groove 35e. Further, O-rings 36 as seal members are arranged on both sides of each groove 35e. In some cases, the O-ring 36 can be omitted except for those at both ends.

FIG. 6 is an enlarged view of the operation device 11 shown in FIG. In the figure, a valve body 30 of a swing control valve 28 for the swing motor 10 is fixed to a fixed member 37 fixed to the cab 2A. A movable support member 38 is fixed to the valve operation lever 31 of the turning control valve 28. The movable support member 38 is rotatable horizontally and horizontally with respect to the fixed member 37 integrally with the valve operation lever 31.

On the movable support member 38, the operating device base 3
9 is fixed. A base end of a boom lever 41 as an operation-side rotation member is rotatably connected to the operation device base 39. An arm lever 42 as an operation-side rotating member is rotatably connected to the tip of the boom lever 41. Further, a bucket lever 43 as an operation-side rotating member is rotatably connected to a distal end portion of the arm lever 42. The bucket lever 43 also serves as a handle of the operating device 11, and is configured to be easily gripped by the operator of the cab 2A. Also, the bucket lever 43
May be equipped with an electric switch or the like for operating an auxiliary device.

A boom lever pulley 44, an arm lever pulley 45, and a bucket lever pulley 46 as operation side pulleys that rotate integrally with the levers 41 to 43 are fixed to base ends of the levers 41 to 43. . A loop-shaped boom wire 47, an arm wire 48, and a bucket wire 49 are provided on the outer periphery of each of the lever pulleys 44 to 46, respectively.
Is wound around each end. Each wire 47-49
Is fixed to each of the lever pulleys 44 to 46 at one place on the circumference thereof, for example, by tightening a set screw (not shown).

The wires 47 to 49 are guided to the vicinity of each of the lever pulleys 44 to 46 while being slidably inserted into the wire tube 50, respectively. further,
One end of each wire tube 50 is connected to the operating device base 39,
It is fixed to the boom lever 41 and the arm lever 42, respectively. A spring 51 is provided between the boom lever 41 and the operating device base 39 to prevent the operating device 11 from falling down due to its own weight.

Next, FIG. 7 is a front view showing the unit case 15 of FIG. 1, FIG. 8 is a plan view of FIG. 7, and FIG. 9 is a schematic configuration diagram showing the inside of the unit case 15 of FIG. Control valves 25 to 27 as shown in FIGS. 4 and 5 are housed in the unit case 15. The unit case 15 includes a boom sensor 12 and an arm sensor 13.
And three servo motors 52 driven by receiving signals from the bucket sensor 14 are fixed. These servo motors 52 rotate the rotating parts 35 of the control valves 25 to 27 via a speed reduction mechanism (not shown).

The rotating parts 35 of the control valves 25 to 27 include:
The internal ports 35a to 35
Cylindrical joint members 53 for supplying and discharging hydraulic oil to and from d are connected to each other, and a swivel joint (rotary joint) is configured by the rotating portion 35 and the joint member 53. Each joint member 5
3, four (P, T, A, B) external ports 53a to 53d communicating with the four grooves 35e of the rotating part 35 are provided as shown in FIG. However, the positions of the external ports 53a to 53d in the circumferential direction, P, T, A, B
Are not particularly limited.

On the unit case 15, three valve side pulleys 54 to 56 are provided. These valve-side pulleys 54 to 56 are connected to shafts 33 of the control valves 25 to 27.
And the valve-side pulleys 54-5
6, the shaft 33 and the valve operating lever 34 rotate integrally.

Each of the valve side pulleys 54 to 56 has
The other ends of the boom wire 47, the arm wire 48, and the bucket wire 49 are wound respectively. Each wire 47
Are fixed to each of the valve-side pulleys 54 to 56 at one location on the circumference thereof, for example, by tightening a set screw (not shown). Thus, the rotation of each of the lever pulleys 44 to 46 is transmitted to the valve-side pulleys 54 to 56 via each of the wires 47 to 49. Further, the other end of each wire tube 50 is detachably mounted on the unit case 15.

Hydraulic piping (not shown) for connecting the external ports 53a to 53d of each joint member 53 to the hydraulic circuit portion 29 (FIG. 2) is provided on the outer peripheral portion of the unit case 15.
A plurality of external connection ports 57 to which the
A plurality of connectors 58 to which wirings from 2 to 14 are connected are provided. Of the external ports 53a to 3d of each joint member 53, A and B are respectively connected to individual external connection ports 57, and P and T are unit case 15
And are connected to a common external connection port 7.

The operation transmitting means in this example includes lever pulleys 44 to 46, wires 47 to 49, and a wire tube 5.
0 and the valve-side pulleys 54 to 56. Also,
The operation unit includes an operation device 11, a unit case 15 including mounted devices, wires 47 to 49, and a wire tube 50.
And each of the sensors 12 to 14.

Further, a circuit board (not shown) provided with a control circuit for controlling the servomotor 53 in response to signals from the sensors 12 to 14 is accommodated in the unit case 15. FIG. 11 is a circuit diagram showing an example of a control circuit of the servo motor 53 of FIG. In the figure, a reference voltage V
R1 and VR2 are generated and input to the first and second comparators 62 and 63. Hysteresis circuits 64 and 65 for suppressing hunting are connected to the first and second comparators 62 and 63.

The servo motor 52 includes a transistor TR1
, And is driven in both directions in accordance with the outputs from the first and second comparators 62 and 63 (in the figure, i indicates an example of the current direction). Further, the rotation of the servo motor 52 is detected by the following potentiometer 52a, and a signal from the following potentiometer 52a is input to the first comparator 62. Such a control circuit is provided for each servo motor 52.

Next, the operation will be described. Driver's cab 2A
The operator who has boarded the is operating the bucket lever 4 of the operating device 11.
3 while grasping the bucket 6 and the work site,
The bucket lever 43 is moved so as to move the bucket 6. Thereby, each joint part of the operating device 11 rotates.

For example, if the boom lever 41 is rotated in the counterclockwise direction (downward direction) in FIG. 6, the boom lever pulley 44 is similarly rotated. Since the boom wire 47 is fixed to the boom lever pulley 44, the rotation of the boom lever pulley 44 moves the boom wire 47 so as to circulate in the wire tube 50, and the corresponding valve-side pulley 54 is synchronized. Is rotated.

When the valve-side pulley 54 is rotated, the valve operating lever 34 of the boom control valve 25 is rotated together with the shaft 33, and the valve body 32 is operated. At this time, the piping of the hydraulic circuit section 29 is configured such that the boom 4 rotates in the same direction as the boom lever 41. Therefore, when the boom lever 41 is rotated, the boom 4 is similarly rotated slightly after the operation thereof.

When the boom 4 rotates in this manner, it is detected by the boom sensor 12 and the unit case 15
The servo motor 52 fixed therein is driven, and the rotating portion 35 of the boom control valve 25 and the valve body 32 are rotated with respect to the joint member 53. The rotation direction at this time is a direction in which the valve main body 32 operated by the valve operation lever 34 returns to the neutral state. Therefore, when the boom lever 41 is continuously rotated, the boom control valve 25 is rotated following the rotation, and the boom 4 is continuously rotated.

When the rotation of the boom lever 41 stops, the boom control valve 25 remains in the neutral state, and the rotation of the boom 4 also stops. When the boom lever 41 is operated in the opposite direction, the above operation is reversed. Also,
The arm 5 and the bucket 6 are operated similarly to the boom 4.

Next, the turning operation will be described. When the entire operation device 11 is turned in a direction in which the user wants to turn while holding the bucket lever 43, the valve operation lever 31 of the turning control valve 28 is directly operated, and the entire upper turning body 2 turns in the same direction. By this turning operation, the valve body 3 of the turning control valve 28 fixed to the upper turning body 2
0 turns, and the valve operating lever 31 is relatively returned to the neutral position. Therefore, while the operating device 11 is turned in the turning direction, the upper swing body 2 turns in the same direction, and if the turning of the operating device 11 is stopped,
The swing of the upper swing body 2 also stops.

As described above, since the link mechanism of the working device 3 can be smoothly operated by following the link mechanism of the operating device 11, the operator can operate the working device 3 with a feeling close to moving the working device 3 directly. The device 11 can be operated. When the bucket lever 37 is moved, the operation device 1
Since the first link mechanism automatically follows the shortest distance, it is not necessary to consider the individual angle of each link. Therefore,
The work efficiency can be improved without requiring special skills, and the entire construction period can be greatly reduced.

Further, since the rotating members of the working device 3 and the operating device 11 correspond one to one, for example, the boom 4
There is no need to consider the relative speed and the relative displacement of the arm 5 for the operation of the above, and the device configuration is simple. That is, since the distribution of the hydraulic oil to the hydraulic cylinders 7 to 9 and the swing motor 10 is automatically performed, complicated control by the distributor is unnecessary, and the output of the pump provided in the hydraulic circuit 29 is maximized. The cost can be drastically reduced by using this method.

Further, since the control valves (regulator valves) 25 to 28 can be adjusted not only on / off but also flow rate within a predetermined stroke, the operation of the working device 3 can be finely adjusted. This can be performed by the operation device 11.

Further, the sensors 12 to 14 are attached to the working device 3, the operating device 11 is attached to the cab 2A, the unit case 15 is installed, the wires 47 to 49 are stretched, and the sensors 12 to 14 and the unit case 15 are attached. And the connection of the hydraulic piping between the hydraulic circuit section 29 and the unit case 15, it can be easily mounted on the existing hydraulic working machine, and the maintenance can be performed by the wire 47.
It is easy to adjust / exchange and to check the wiring.

Further, the rotating part 35 and the joint member 53
And the swivel joint, the hydraulic pipe does not become entangled even when the valve body 32 rotates, and the structure is simple and the reliability is improved.
Can be made compact.

Note that the operation transmitting means is not limited to the above example. For example, other means such as a flexible wire in which the wire itself rotates in the tube, or the rotation of the operation side rotating member is used. The detection may be performed by a sensor, and the valve operating lever may be rotated by a servomotor according to the output.

A signal from each of the sensors 12 to 14 to the servomotor 52 may be transmitted by wiring a lead wire, but it is also possible to transmit the signal wirelessly, and to prevent a failure due to disconnection of the lead wire. can do.

Further, in the above example, the control valves 25 to 2
Although the rotating portion 35 of the eighth embodiment has a columnar shape and is surrounded by the cylindrical joint member 53, the cylindrical joint member may be surrounded by the cylindrical rotating portion. Also,
A seal member such as the O-ring 36 may be provided on the joint member side.

Further, in the above example, the operation of the three hydraulic cylinders 7 to 9 and the swing motor 10 has been described. However, for example, when the boom 4 is swung, or when the boom 4 is extended in the horizontal direction of FIG. The present invention can also be applied to a case where the rotation is performed about the center. It is also possible to provide two sets of working devices and operating devices, respectively, so that they can be operated simultaneously with both hands. In these cases, if the above-described operation unit is used, it is only necessary to increase the number of similar structures, so that the expansion is easy.

When the operating device is operated at a speed far exceeding the speed at which the working device can follow, the wire is stretched or broken, and in order to prevent this, a hydraulic damper for adding resistance to the operating force of the operator is used. May be attached to the operation device.

Further, in the above example, the swing control valve 24
Was also performed by the operation device 11, but the turning control valve 24 may be operated by providing another lever, or providing a pedal at the foot of the cab 2A, and operating this pedal with the foot. .

Further, in the above example, a hydraulic excavator,
Although the hydraulic backhoe has been particularly shown, the present invention can be applied to various hydraulic working machines such as a truck backhoe, a jumbo breaker, a crusher, a clamshell, a hydraulic fork (scissors), and a hydraulic vibrator.
In addition, various attachments may be attached instead of the bucket. Further, the present invention can be applied to a stationary working machine having no lower traveling body, and the operating device can be provided outside the working machine main body. Furthermore, the present invention can be applied to a hydraulic working machine used not only for construction but also for any work.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a hydraulic shovel according to an example of an embodiment of the present invention.

FIG. 2 is a schematic block diagram showing a main part of a hydraulic circuit of the hydraulic shovel of FIG.

FIG. 3 is a front view showing the turning control valve of FIG. 2;

FIG. 4 is a plan view showing a boom control valve, an arm control valve, and a bucket control valve of FIG. 2;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a configuration diagram showing the operation device of FIG. 1 in an enlarged manner.

FIG. 7 is a front view showing the unit case of FIG. 1;

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a schematic configuration diagram showing the inside of the unit case of FIG. 7;

FIG. 10 is a cross-sectional view showing a joint state between the joint member of FIG. 9 and a rotating part of a control valve.

FIG. 11 is a circuit diagram illustrating an example of a control circuit of the servo motor of FIG. 9;

[Explanation of symbols]

1 lower traveling structure, 2 upper revolving structure, 3 work equipment, 4
Boom (working-side rotating member), 5 arms (working-side rotating member), 6 buckets (working-side rotating member), 7 to 9 hydraulic cylinders, 10 turning motor, 11 operating device, 12
Boom sensor, 13 arm sensor, 14 bucket sensor, 15 unit case, 21 boom switching valve, 22 arm switching valve, 23 bucket switching valve, 24 swing switching valve, 25 boom control valve, 2
6 Arm control valve, 27 Bucket control valve, 2
8 Swing control valve, 29 Hydraulic circuit, 30, 32
Valve body, 31, 34 Valve operation lever, 35 rotation part, 35a to 35d Internal port, 41 Boom lever (operation side rotation member), 42 Arm lever (operation side rotation member), 43 Bucket lever (operation side rotation) Moving member),
44 Boom lever pulley (operation side pulley), 45 arm lever pulley (operation side pulley), 46 bucket lever pulley (operation side pulley), 47 boom wire, 48
Arm wire, 49 Bucket wire, 52 Servo motor, 53 Joint member, 53a-53d External port, 54-56 Valve side pulley.

Claims (7)

[Claims] 1. A working machine main body, a plurality of working side rotating members rotatably connected to each other, a working device mounted on the working machine main body, and a plurality of working side rotating members. A hydraulic cylinder for rotating, a switching circuit for switching the operating direction of the hydraulic cylinder, a hydraulic circuit for operating the hydraulic cylinder, a plurality of hydraulic cylinders respectively corresponding to the working-side rotating members and rotatably connected to each other; An operating device having an operating-side rotating member, a sensor for detecting rotation of the working-side rotating member, a valve body, and a valve rotatably provided on the valve body and operated by the operating device. A control valve having an operation lever and a plurality of internal ports provided at intervals in an axial direction and having a rotating portion that rotates integrally with the valve body, and that controls the switching valve; A plurality of external ports communicated,
A joint member rotatably coupled to the rotating portion to form a swivel joint; an operation transmitting means for transmitting the rotation of the operation side rotating member to rotate the valve operating lever; A hydraulic working machine, comprising: a servomotor that rotates the rotating part and the valve body in a direction to return the control valve to a neutral state in response to a signal. 2. The operation transmission means is provided between an operation side pulley that rotates together with an operation side rotation member, a valve side pulley that rotates a valve operation lever, and the operation side pulley and the valve side pulley. The hydraulic working machine according to claim 1, further comprising a wire for transmitting the rotation of the operation-side pulley to the valve-side pulley. 3. The hydraulic working machine according to claim 2, further comprising a unit case accommodating a control valve, a joint member, and a servomotor, and a unit case provided with a valve-side pulley on an outer peripheral portion. . 4. A work machine main body, a lower traveling body, an upper revolving body on which a working device and an operating device are mounted so as to be pivotable on the lower traveling body, and a revolving motor for revolving the upper revolving body. A switching valve for switching the operation direction of the swing motor is provided in the hydraulic circuit unit, and a swing control valve for the swing motor is fixed to a fixed member supporting an operating device; The swing control valve is operated by rotating the operating device in the swing direction of the upper swing body, and the swing control valve is returned to a neutral state by swinging of the upper swing body. The hydraulic working machine according to any one of claims 1 to 3, wherein: 5. A work machine body, a work device having a plurality of work-side rotating members rotatably connected to each other, mounted on the work machine body, and the plurality of work-side rotating members. A hydraulic working machine for operating a hydraulic working machine, comprising: a hydraulic cylinder for rotating the hydraulic cylinder; and a hydraulic circuit having a switching valve for switching the operating direction of the hydraulic cylinder and operating the hydraulic cylinder. An operating device mounted on the working machine main body, the operating device having a plurality of operating-side rotating members respectively corresponding to the working-side rotating members and rotatably connected to each other; A sensor for detecting rotation, a valve body, a valve operating lever rotatably provided on the valve body and operated by the operating device, and a plurality of internal ports provided at intervals in the axial direction. Bal A control valve for controlling the switching valve, having a plurality of external ports communicated with the internal ports,
A joint member rotatably coupled to the rotating portion to form a swivel joint; an operation transmitting means for transmitting the rotation of the operation side rotating member to rotate the valve operating lever; An operating unit for a hydraulic working machine, comprising: a servomotor that rotates the rotating portion and the valve body in a direction to return the control valve to a neutral state in response to a signal. 6. An operation transmitting means is provided between the operation side pulley that rotates together with the operation side rotation member, a valve side pulley that rotates a valve operation lever, and the operation side pulley and the valve side pulley. 6. The operating unit for a hydraulic working machine according to claim 5, further comprising a wire for transmitting rotation of the operating side pulley to the valve side pulley. 7. The hydraulic working machine according to claim 6, further comprising a unit case accommodating a control valve, a joint member, and a servomotor, and having a valve-side pulley provided on an outer peripheral portion. Operation unit.